I am removing my medpor implants on Monday (21 days post op). What can I do to minimize risk of numbness? (Photos)

1 I want a full excision of all implant , with all screws removed . No foreign body left in my face. Is that a clear enough request ? Is there any chance any material will be left behind ? 2. I want to do a scan after my surgery to make sure everything is removed . What kind of scan should I do ? 3. Please briefly summarize the steps of the surgery 4. What can I do to minimize risk of numbness , nerve damage, skin sagging , etc? 5. Is there anything else I should be thinking of ? Thank you !